Roofing-cleat.



H. R. WARDELL.

ROOFING CLEAT.

APPLICATION FILED OCT/31,1911

1,017,61 1. Patented Feb 13, 1912 Fig. 6

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Patented Feb. 13', 1912.

To an whom it may concern:

Be it known that I, HENRY R. WARDELL, a citizen of the United States of America, residing at New York city, borough of ,Manhattan, countyand State of New York,

of cleats having high arched portions to serve as intermediaries between the tacks and the roofing. These interfere with the free flow of water down the roof and tend to produce pools of water which soften the roofing material so that it disintegrates' or tears easily. Other proposed forms of oleat avoiding the objectionable -arched structure have been too weak and have not firmly gripped the roofing.

I have invented a form of cleatwhich avoids all these difiiculties, the preferred form of which is illustrated in the accompanying sheet of drawings in which,

Figure 1 is a plan view of the cleat. Fig. is a longitudinal section on line 22 of Fig. 1', and Fig. 3 is an enlarged cross sec tion on line 33 of Fig. 1.

Throughout the drawings like reference characters indicate like parts. 1 is a thin strip of steel or othernietal 0 even width throughout and having rounded ends.

2, 2, are dome-like portions stamped up out of the strip at convenient intervals, the diameter of each dome at its base approximately equaling the width of the strip, and its helght being sufiicient to produce a form that'will give a firm resistance against vertical compression.

A series of ribs 3, 3, extend longitudinally of the strip between the domes. Preferably they are arranged centrally of the strip and are formed by stamping down the material of the strip as shown in Fig. 3. The edges, 4, 4, of the strip are also crimped dpwn-fl wardly to a distance approximately equal to the depth of the ribs 3, 3, and the outer -metal having a pluralit edges of the strips may be flanged out- Wardly, as shown at-5, 5. These ribs are formed in strip 1 by corrugating it longitudinally. This give's it stiffness against bending strains without materiall raising it above the surface of the roo ng suiticiently to interfere with the flow of water over it. Each of'the dome-like portions 2, 2, is centrally perforated at 6, to permit the passage of a tack or other fastening means.

vIn operation the tacks or' other fastening means are forced down until the dome-like portions 2, 2, are partly collapsed. This causes the elastic reaction of the metal to force the cleat down on the roofing with a uniform pressure, and to take up any inequalities inthe thickness of the roofing material beneath it, due to Wear or original unevenness. The roofing is firmly grasped, f

by the ribs and crimped edges which form a plurality of gripping means on its under surface and these also contribute greatly to the'strength of the structure without presenting any substantial obstruction to theflow of water over the cleats when in position onthe roof. In short the dome-like portions give strength in transmitting the pressure. of the nails to the body of the strip and distributing the same over it, while the corrugated form of the strip produces a truss-like structure that transmits said pressure along from one dome-like portion to another withou presenting any substantial obstructibn on the roofs surface.

Having, therefore,=described my inven-- tion, I claim y 1. A cleat for use in fastening flexible roofing to a roof which comprises a strip of of dome-like upwardly extending portions perforated at their centers, the remaining portions of the strip having longitudinal corrugations formed therein to stiifen the same and afford a plurality of gripping means on its under surface.

2. A cleat for use in fastening flexible roofing to a roof which comprises a strip of metal having a plurality of centrally perforated dome-like portions extending u wardly to a height sufficient to'produce sti l.- ness against vertical compression, and also having between said dome-like ortions longitudinal corrugations of a muc less height calculatedjto produce stiffness against transverse bending strains.

Q1 umen A cleat for llSB iri fastening flexible under face of the strip adapted to trans roofing to a roof which comprises a strip of .versely. stliien the same and also serve as metal having a plurality of centrally permeans for gripping the roofing beneath.

foisted dome-like portions extending up- HENRY-R. WARDELLZ 53 Wardly to a height suflicient to produce stiif- Witnesses:

ness against vertical compression, and also CHARLEs E. HORTON,

having downwardly projecting ribs 011 the A. J. ARIEL. 

